The pair initially costarred in 2019's 'Big Time Adolescence' before Sweeney appeared in MGK's 2021 musical film 'Downfalls High'

Of course, both MGK and Sweeney are likely used to rumors about their personal lives at this point. For instance, there was chatter Machine Gun Kelly was having an affair with a guitarist back when he and Fox's first went through their relationship issues. You can check out his quick response to that question below, courtesy of WWHL 's Instagram:

Machine Gun Kelly had a succinct, five-word response when asked about whether he and Sydney Sweeney have ever been more than just friends.